Question

Give the smallest positive negative coterminal angle for the ff:
1) k
2) (2k-180)

I have answered the other questions of my assignments but I don't know this one. Like the coterminal angle of 1640deg is 200deg right? But I don't know what's the value of k or what it is. Thank you

Answer 1

Put k = 2k-180
k = 180 deg
See k = 180 is common terminal to both.

Answer 2

thank you for the fast reply. May I ask what k is called?? Or shouldn't it be called a pi because it's 180 deg?? so if k = 180 then 2k = 360 deg?

Answer 3

Or what is the difference of k and pi?

Answer 4

k is a symbol for an angle. It has nothing to do with pi. I think so.

Answer 5

I see... So what's the coterminal angle for k??

Answer 6

I think the question is about coterminal angle for k and 2k-180, not for k only !

Answer 7

Okay, thank you very much for answering all my questions!

Answer 8

You are welcome :)